Disclosed are an auxiliary mat for a vehicle and an apparatus for processing the mat. The mat may include a fabric to form an exterior appearance, a bubble paper to which the fabric is threaded and coupled, a coating layer coated on the lower surface of the bubble layer, a backing layer coupled to a lower surface of the coating layer, an adhesive layer interposed between the coating layer and the backing layer, and serving as an adhesive for bonding the lower surface of the coating layer and an upper surface of the backing layer, and a plurality of protrusions coated on a lower surface of the backing layer, and formed in a shape protruding from the lower surface of the backing layer. The protrusions may be coated on the lower surface of the backing layer in a substantially uniform dot pattern.